Air-pump



I. KEAN, DEC'D. i. KEAN, ADMINISTRATRIX.

AIR PUMP.

APPLICATION FILED FEB. 14. 1916.

Patented J an. 13, 1920.

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2% saw UNITED STATES PATENT OFFICE.

JOSEPH BEAN, OF DES MOINES, IOWA; IDA KEAN ADMINISTRATRIX SAID JOSEPH KEAN, DECEASED.

AIR-PUMP.

To all whom it may concern: I

Be it known that I, JOSEPH KEAN, citizen of the United States of America, and resident of Des Moines, Polk county, Iowa, have invented a new and useful Air-Pump, of which the following is a specificaton.

The object of this invention is to provide an improved construction for air pumps arranged and adapted to be carried about and clamped on a suitable support such as the step or foot-board of an automobile, and be employed for inflating pneumatic tires.

A further object of this invention is to provide improved means for operating an air pump by to and fro movements as c011- tradistinguished to vertical movements commonly employed. I

A further object of this invention is to provide improved means for clamping an air-pump to a suitable support, such as the step or foot-board of an automobile.

My invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in my claims and illustrated by the accompanying drawing, in which Figure 1 is an elevation showing the pump mounted as designed for practical use, a portion of the operating handle being broken away to economize space. Fig. 2 is a cross-section on the indicated line 22 of Fig. 1, the support being omitted. Fig. 3 is a horizontal section on the indicated line 33 of Fig. 1, the support being omitted. Fig. 4 is a horizontal section on the indicated line 44 of Fig. 1.

In the construction of the pump as shown the numeral 10 designates a base plate preferably formed with a bracket or arm 11, T-shaped in cross-section (Fig. 4), depending from one end portion thereof. An arm 12 is formed with a slide bearing 13 at one end adapted to embrace and slide upon the flanges of the bracket 11, and said arm is arranged at right angles to the bracket and parallel with and below the base plate 10.

A clamp member or jaw 14, relatively broad and flat and serrated or roughened on its upperface, is formed on and carried by the arm 12 in opposition to, parallel witlrand below the base'plate 10. An adjusting screw 15 is screwed through a screw-seat in the arm 12 adjacent to the bracket 11 and parallel with said bracket, and the upper end portion of said screw is swiveled in the base Specification of Letters Patent.

common manner to the Patented J an. 13,1920.

Application filed February 14, 1916. Serial No. 78,088.

plate. It is the function of the screw 15, under manual actuation, to adjust the arm 12 and jaw 14 relative to, and at all times parallel with, the base plate 10. A, pump cylinder 16 is provided and an iniperforate piston 17 is mounted for reciprocation therein. Caps 18, 19 are screwed on the op posite ends of the cylinder 16. Each cap 18, 19 is formed with legs 20, 21 spaced apart and adapted to be secured, as by bolts 22, to end portions of the base plate 10, thus providing means for supporting the cylinder above and in spaced relations to the base plate. A gland 23 is mounted in the central portion of the cap 19 and a piston-rod 24 extends through said gland and is fixed in a piston 17. A fulcrum 25 is pivoted at one end tothe lower end portion of the web of the bracket 13and extends horizontally therefrom. A 1ever26 is pivoted at its lower end to the outerend ofthe fulcrum 25 and the outer end of the piston-rod 24 is pivoted to the lever above the fulcrum. The lever 26 preferably is forked between the fulcrum and piston-rod. The lever also is jointed, the upper member 26 thereof serving as a handle and being removable and replaceable. Each cap 18, 19 is formed with a laterally-extending chamber 27 communicating through the cap to the interior of the cylinder 16 on opposite sides of the piston 17, and check-valves 28, of an upwardly-opening type, are screwed into and depend from the lower ends of the chambers, thus providing valve-controlled air-inlet ports for opposite ends of the cylinder. An air-pipe 29 connects the chambers 27 and check-valves 30, of outWardlyopening inwardly-closing type, are mounted in opposite end portions of said pipe. A (T) tee 31 is mounted in the air-pipe 29 between the valves 30 and the lateral of said T is directed downwardly. A flexible pipe or air-hose 32 is mounted on the lateral of the T 31 .and leads beneath the cylinder and longitudinally thereof between the legs of the cap 19 and through the fork of the lever 26, and is provided with a nozzle 33 on its outer end adapted to engage a valve-stem or other suitable connection, not shown.

The handle 26 may be removed from the lever 26 for convenience in packing and transporting the device.

In practical use, the pump is mounted on a suitable support 34, such as the step or foot-board of an automobile, the base plate 10 resting on the support and the jaw 14: being engaged with the lowerface of the sup;- port by manipulation of the adjusting; screw 15 acting through the arm 12. Then the nozzle 33 is attached to a suitable connection on the chamber to be filled and the pump is operated. by manual movement of the handle 26 to and fro, the movement of the hand or hands of the operator being approximately on horizontal lines. Air enters the cylinder on opposite sides of the piston alternately through the valves 28, chambers 27 and caps, 18, 19. Air leaves the cylinder in alternate impulses through the caps 18, 19, chambers 27', pi e 29 and hose 32, being directed through said hose by control of the valves 30 acting alternately. The valves 30 are set to permit outward, but not inward, movement of the air relative to the cylinder.

Mounting of the pump as shown and described makes it convenient of manipulation without material bending or cramping of the body of the operator.

I claimas my invention 1. An air pump comprising a base plate, means for mounting said plate, a bracket depending from one end portion of said plate, caps formed with legs fixed to said plate, a cylinder connecting said caps and arranged parallel with said plate, an air pipe communicating with said cylinder, a hose communicating with said air pipe and extending beneath the cylinder and outwardly between a pair of said legs, a piston in said cylinder, a rod attached to saidpiston and extending through one of said caps, and a lever fulcrumed on said bracket and pivoted to said rod.

2. An air pump comprising a base plate, a bracket depending from one end of said plate, said bracket being T-shaped in crosssection, an arm arranged parallel with and beneath said plate, said arm bein formed with a slide bearing fitted to and adapted to slide on said bracket, a jaw on said arm parallel with said plate, an adjusting screw threaded through said arm and swiveled in said plate, a lever fulcrumed on said bracket and rising therefrom, caps formed with legs fixed to end portions of said base plate, a cylinder connecting said caps and arranged parallel with said plate, an air pipe communieating with said cylinder, a hose communicating with said pipe and extending beneath said cylinder and one cap and outwardly between a pair of the legs supporting said cap, a piston in said cylinder, and a rod attached to said piston and extending through one of said caps and pivoted to said lever.

Signed by me at Des Moines, Iowa, this eighth day of December, 1915. I JOE KEAN. Witnesses: Y

J; W. WHITE, S. O. SWEET. 

